Fix swapped product IDs for the ATMEGA8U2 and AT90USB82 in the DFU class bootloader.

git-svn-id: http://lufa-lib.googlecode.com/svn@2592 d5102386-fcda-11dd-9fdb-3debd5008f28
Changed all *_SendByte() function prototypes to accept a void pointer for the input buffer (thanks to Simon Küppers) instead of a uint8_t pointer.

git-svn-id: http://lufa-lib.googlecode.com/svn@2593 d5102386-fcda-11dd-9fdb-3debd5008f28